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Influenza A (H3N2), Denmark (WAHID Interface - OIE World Animal Health Information Database, 11/28/09, edited)

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    Influenza A (H3N2), Denmark (WAHID Interface - OIE World Animal Health Information Database, 11/28/09, edited)

    Influenza A (H3N2), Denmark (WAHID Interface - OIE World Animal Health Information Database, 11/28/09, edited)
    Influenza A (H3N2), Denmark

    Information received on 27/11/2009 from Dr Jan Mousing, Chief Veterinary Officer, Danish Veterinary and Food Administration, Ministry of Food, Agriculture and Fisheries, Soborg, Denmark
    • Summary
      • Report type Follow-up report No. 2
      • Start date 28/09/2009
      • Date of first confirmation of the event 21/10/2009
      • Report date 27/11/2009
      • Date submitted to OIE 27/11/2009
      • Reason for notification Emerging disease
      • Morbidity 25 %
      • Mortality 0.8 %
      • Zoonotic impact The potential for infecting humans is unknown but cannot be ruled out.
      • Causal agent Influenza A (H3N2)
      • Related reports
        • Immediate notification (23/10/2009)
        • Follow-up report No. 1 (30/10/2009)
        • Follow-up report No. 2 (27/11/2009)

    • New outbreaks
      • Outbreak 1 (H3N2-2009-008) - Mejrup, Holstebro, North
        • Date of start of the outbreak 28/09/2009
        • Outbreak status Resolved (29/10/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 14000 - 180 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 28 September 2009. The official restrictions on the farm were lifted on 29 October 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 2 (H3N2-2009-013) - Mejrup, Holstebro, North
        • Date of start of the outbreak 01/10/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 5600 - 80 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 1 October 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 3 (H3N2-2009-020) - Skave, Holstebro, North
        • Date of start of the outbreak 19/10/2009
        • Outbreak status Resolved (18/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 8000 - 500 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 19 October 2009. The official restrictions on the farm were lifted on 18 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 4 (H3N2-2009-014) - Hodsager, Herning, North
        • Date of start of the outbreak 03/10/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 20000 - 130 - 0 - 0
          • Affected Population: The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 3 October 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 5 (H3N2-2009-016) - Idom, Holstebro, North
        • Date of start of the outbreak 03/10/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 9000 - 175 - 0 - 0
          • Affected Population: The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 3 October 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 6 (H3N2-2009-025) - Velling, Ringk?bing-Skjern, North
        • Date of start of the outbreak 27/10/2009
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 12000 - 180 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 27 October 2009.
      • Outbreak 7 (H3N2-2009-007) - Tvis, Holstebro, North
        • Date of start of the outbreak 28/09/2009
        • Outbreak status Resolved (30/10/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 12000 - 2000 - 25 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 28 September 2009. The official restrictions on the farm were lifted on 30 October 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 8 (H3N2-2009-009) - Skave, Holstebro, North
        • Date of start of the outbreak 28/09/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 15000 - 500 - 300 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 28 September 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 9 (H3N2-2009-019) - Vinderup, Holstebro, North
        • Date of start of the outbreak 19/10/2009
        • Outbreak status Resolved (16/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 14000 - 50 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 19 October 2009. The official restrictions on the farm were lifted on 16 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 10 (H3N2-2009-026) - Br?rup, Vejen, South
        • Date of start of the outbreak 30/10/2009
        • Outbreak status Resolved (13/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 14100 - 2 - 2 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 30 October 2009. The official restrictions on the farm were lifted on 13 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 11 (H3N2-2009-015) - N?rhede, Holstebro, North
        • Date of start of the outbreak 03/10/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 12000 - 85 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 3 October 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 12 (H3N2-2009-017) - ?rnh?j, Herning, North
        • Date of start of the outbreak 07/10/2009
        • Outbreak status Resolved (12/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 28000 - 7000 - 120 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 7 October 2009. The official restrictions on the farm were lifted on 12 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 13 (H3N2-2009-023) - Ulfborg, Holstebro, North
        • Date of start of the outbreak 26/10/2009
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 4000 - 1000 - 50 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 26 October 2009.
      • Outbreak 14 (H3N2-2009-024) - Hogager, Holstebro, North
        • Date of start of the outbreak 27/10/2009
        • Outbreak status Resolved (13/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 55000 - 4125 - 20 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 27 October 2009. The official restrictions on the farm were lifted on 13 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 15 (H3N2-2009-011) - S?nder Nissum, Holstebro, North
        • Date of start of the outbreak 01/10/2009
        • Outbreak status Resolved (29/10/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 37000 - 5550 - 250 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 1 October 2009. The official restrictions on the farm were lifted on 29 October 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 16 (H3N2-2009-018) - Tvis, Holstebro, North
        • Date of start of the outbreak 08/10/2009
        • Outbreak status Resolved (18/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 15500 - 15000 - 70 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 8 October 2009. The official restrictions on the farm were lifted on 18 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 17 (H3N2-2009-010) - Tvis, Holstebro, North
        • Date of start of the outbreak 29/09/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 8600 - 150 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 29 September 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 18 (H3N2-2009-012) - Naur, Holstebro, North
        • Date of start of the outbreak 01/10/2009
        • Outbreak status Resolved (03/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 8750 - 80 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 1 October 2009. The official restrictions on the farm were lifted on 3 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 19 (H3N2-2009-021) - Bramming, Esbjerg, South
        • Date of start of the outbreak 20/10/2009
        • Outbreak status Resolved (10/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 25000 - 19250 - 120 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 20 October 2009. The official restrictions on the farm were lifted on 10 November 2009 due to the absence of clinical signs for more than 7 days.
      • Outbreak 20 (H3N2-2009-022) - Kjellerup, Silkeborg, North
        • Date of start of the outbreak 26/10/2009
        • Outbreak status Resolved (23/11/2009)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 6000 - 60 - 7 - 0 - 0
          • Affected Population The holding consists of minks (Mustela vison) for fur production. The first samples were collected on 26 October 2009. The official restrictions on the farm were lifted on 23 November 2009 due to the absence of clinical signs for more than 7 days.

    • Summary of outbreaks
      • Total outbreaks: 20
        • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • other species - 323550 - 54487** - 2574 - 0 - 0
        • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
          • other species - ** - 0.80% - ** - 0.80%
          • * Removed from the susceptible population through death, destruction and/or slaughter
          • ** Not calculated because of missing information

    • Epidemiology
      • Source of the outbreak(s) or origin of infection
        • Unknown or inconclusive

    • Epidemiological comments
      • Official restrictions have been placed on the involved mink holdings.
      • Official restrictions are lifted when clinical signs have been absent for at least seven days.
      • The mortality has on average been 0.8% in the affected holdings, which is slightly higher than the original estimate.
      • The morbidity is very different between the affected holdings (ranging from less than 1% to 97%) and has on average been approximately 25%, which is considerably higher than initially estimated.

    • Control measures
      • Measures applied
        • Quarantine
        • Movement control inside the country
        • Screening
        • No vaccination
        • No treatment of affected animals
      • Measures to be applied
        • No other measures

    • Diagnostic test results
      • Laboratory name and type National Veterinary Institute (National laboratory)
        • Tests and results: Species - Test - Test date - Result
          • other species - polymerase chain reaction (PCR) - 22/10/2009 - Positive
          • other species - polymerase chain reaction (PCR) - 05/11/2009 - Positive
          • other species - polymerase chain reaction (PCR) - 10/11/2009 - Positive
      • Laboratory name and type State Serum Institute (National laboratory)
        • Tests and results: Species - Test - Test date - Result
          • other species - real-time PCR - 21/10/2009 - Positive

    • Future Reporting
      • The event is continuing. Weekly follow-up reports will be submitted.

    -
    <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8685" >WAHID Interface - OIE World Animal Health Information Database</cite>
    Tags: a/h3n2, denmark, minks, oie, updates
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